I finally found one!

I picked it up like new in the originbal box for $800. It may not be a "Notro-Express" classic side by side, but I won't be afraid to use it! First trip to the range puts all shots in 8 inches at 50 yards with a variety of hand loads. Looks like it prefers 300 grain projectiles over the 405 grain cast bullets that my lever gun favors.

I just might kill a moose with it in November!